<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片识图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row :gutter="10">
        <el-col :span="6">
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="roleList" style="width: 100%" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :gutter="10" v-for="(item1,i1) in scope.row.children" :key="item1.id"
              :class="['bdbottom',i1 == 0 ? 'bdtop' : '','vcenter']">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag type="primary" closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环 嵌套渲染二级权限 -->
                <el-row :class="[i2 == 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key=item2.id>
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="(item3,i3) in item2.children" :key="item3.id" type="warning" closable
                      @close="removeRightById(scope.row,item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre> {{scope.row}}</pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"> </el-table-column>
        <el-table-column label="角色名称" prop="roleName"> </el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"> </el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" :default-expand-all=true
        :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      roleList: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightsList: [],
      // 树形控件的树形绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表方法
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status != 200) return this.$Message.error('获取角色列表失败!')
      this.roleList = res.data
      //   console.log(this.roleList);
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 判断用户是否要删除
      if (confirmResult != 'confirm') {
        return this.$Message.info('取消了删除')
      }
      //   console.log('确认了删除');
      //   console.log(role, rightId);
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status != 200) return this.$Message.error('删除权限失败!')
      //   this.getRolesList();
      role.children = res.data
      this.$Message.success('删除角色权限成功!')
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status != 200) return this.$Message.error('获取权限数据失败')
      // 把获取到的权限数据保存到data中
      this.rightsList = res.data
      //   console.log(this.rightsList);
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
      //   console.log(this.defKeys);
    },
    // 递归函数 通过递归的形式 获取角色下所有三级权限的id 并保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前 node节点 不包含children属性 则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach(item =>
        this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      //   console.log(this.roleId);
      //   console.log(typeof this.roleId);
      const idStr = keys.join(',')
      //   console.log(idStr);
      //   console.log(keys);

      //   console.log(isNaN(parseInt(this.roleId)));
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) return this.$Message.error('分配权限失败')
      this.$Message.success('分配权限成功')
      this.getRolesList();
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-table {
  margin-top: 15px;
}

.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>